Question 99
Be $x, y, z \gt 0$ real numbers with $x y z = 1$. Prove the inequality $$
\frac{(x+y-1)^2}{z} + \frac{(y+z-1)^2}{x} + \frac{(z+x-1)^2}{y} \geq x + y + z
$$
\frac{(x+y-1)^2}{z} + \frac{(y+z-1)^2}{x} + \frac{(z+x-1)^2}{y} \geq x + y + z
$$